I just made a Manometer & wish I had done it sooner.
My LGT 100 has started smoking & using oil. After removing the head the cylinder looked OK & from the oil on the head & top of the cylinder I began thinking head gasket. The gasket looked ok but checking the head it did not seem flat. Wet sanding the head on a flat surface did seem to help, so a new head gasket & wet sanding the head until it was flat I put it all back together hoping it was repaired. It did run better but was still smoking like a mosquito fogger. So before I tear it completely apart I decide to make a Manometer to check the Kohler engine better. This is what I found.
Ready to start the engine.
3/4 throttle & gets worse as push closer to full throttle
So which is it rings or valve guides? I am working right now to pull the engine out & tear it down to find out.